1. The problem statement, all variables and given/known data There is a large bed floating in sea with the density of 765 kg/m^3. What fraction of the bed's volume will be under the surface of the water? The density of sea water is 1035 kg/m^3. 2. Relevant equations Fb = Density * v * gravity 3. The attempt at a solution I know its a buoyancy problem, but i have no idea where to get started. i can't find the Fb b/c volume's not given. maybe i have to set them equal to each other? so 765 kg/m^3 * Volume * gravity = 1035 kg/m^3 * V * g so it woulbd be .739% of the volume. It seems too easy or is this right? Thank you!